Multiple feeder for uniflow system



sept. 9, w41.

D. R. HlLLls 2,255,665 MULTIPLE FEEDER FOR-UNIFLow SYSTEM Filed Deo. 5, 1936 4 Sheets-Sheet l INVENTOR.

Sept. 9; 1941. D. R. HMS 2,255,555

MULTIPLE FEEDER FOR UNIF-LOW SYSTEM Filed Dec. 5, -1936 4 Sheets-Sheet 2 ATTORNEY. Y

Sept. 9, 1941. D. R. H|| |s 2,255,665

MULTIPLE FEEDER FOR UNIFLOWv SYSTEM Filed Dec. 5, 1956 4 Sheets-Sheet 3 A k In sa mm INVENTOR. //////5 l ATTORNEY.

Sept. 9, 1941.

D. R. HlLLls 2,255,665

MULTIPLE FEEDER FOR UNIFLOW SYSTEM 4 Sheets-Sheetl 4 Filed Dec. 5, 1936 r .1 r w @207 ama/ m/z/ En. ll.

' INVENTOR. LQ x//q/ //////'.S

ATTORNEY Patented Sept. 9, 1941 UNETED STATES PATENT OFFICE BIULTIPLE FEEDER FOR UNIFLOW SYSTEM Application December 5, 1936, Serial No. 114,323

15 Claims.

My invention pertains to an automatic fluid dispensing device and more particularly to a fluid dispensing feeder for use in a uniflow uid supply system.

It is an object of my invention to provide a fluid dispensing feeder of positive operating char-- acteristics which is of simple construction and few moving parts and which is adapted for operation in uniilow systems to successively dispense measured quantities of fluid in response to the application of a unidirectional fluid pressure therein.

It is also an object of my invention to provide such a fluid dispensing feeder of the above type comprising a fluid responsive operator having a hollow piston slidably disposed in the feeder casing, a piston Valve slidably disposed in the hollow piston and actuated by fluid pressures applied to it by movement of the hollow piston for in turn applying fluid pressures to reversely operate the piston, and fluid dispensing means operated by the movements of said hollow piston for successively dispensing measured quantities of iiuid from dispensing ports in said casing.

It is a further object of my invention to provide a fluid dispensing feeder of the above type including an interlocking pin slidably disposed in a side wall of the piston for engaging in recesses in a camming plug disposed` in the outer wall of the feeder casing and for engaging two interlocking recesses provided in the slidable piston valve whereby simultaneous relative movement of the piston and valve in response to the fluid pressures applied is positively prevented.

Another object of my invention is to provide a fluid dispensing feeder of the above type comprising an elongated casing having the automatic hydraulic operator piston disposed for slidable whereby the device may be operated by any suitable working uid, such as a light grade of voil or other fluid for dispensing a heavier gradeof oil or other fluid which will not be contaminated or co-mingled therewith.

A further object of my invention is tol provide a iiuid dispensing feeder comprising automatic hydraulically operated means continuously operating in said casing in response to high pressure fluid applied therein for operating relatively large dispensing pistons slidable axially in the casing, an indicator rod projecting from each of said dispensing pistons, a protector sheath partially enclosing each one of said indicator rods and an adjustable stop in each of said protector sheaths for adjustably limiting the movement of the dispensing pistons to adjust measured quantities of fluid thereby dispensed.

The novel features that I consider characteristic of my invention are set forth with particularity in the appended claims. The invention itself, however, both as to its organization and its method of operation, together with additional objects and advantages thereof, will besty be understood from the following description of specific embodiments, when read in connection with -the accompanying drawings, in which:

Fig. 1 is a side elevational view of one embodiment of my uniflow fluid dispensing feeder;

Fig. 2 is a longitudinal sectional view on line 2-2 .of Fig. 3; A

Figs. 3 and 4 are cross sectional views taken respectively on lines 3-3 and 4-4 of Fig. 2;

Fig. 5 is a longitudinal sectional view taken on two planes intersecting at right angles as indicated by line 5-5 on Fig. 4;

Fig. 6 is a similar view showing the positions of the operating elements in a different phase of the operating cycle;

Fig. 7 is a longitudinal View of a different embodiment of my feeder comprising a separate inlet port for independently receiving the fluid to be dispensed taken on line l-l of Fig. 8;

Fig. 8 is a transverse sectional view on line 8--8 of Fig. 7

Fig. 9 is a side elevational view of another embodiment of my invention;

Fig. l0 is a longitudinal view on line lil-I0 thereof;

Fig. 11 is a transverse sectional view on line II-H of Fig. l0; and

Fig. l2 is a similar view showing the reverse operating connections established by movement of the hydraulic-operator to its alternative position.

Referring more specifically to Figs. 1-6 this embodiment of my fluid dispenser comprising an automatic uniflow operated feeder consists of a metallic body or casing I for housing the movable elements therein. For receiving uid from any suitable high pressure source or system I provide an inlet port 3 comprising a passage drilled l the exhaust 'pipe 3 and `4ports I are shown in Fig. 4. y threads ll are provided in the dispensing ports longitudinally therein from one end. The inlet port 3 is provided with internal threads 5 adjacent its'outer end for convenient connection with lthe end of a pipe l which carries and supplies the iluid to be dispensed under suitable pressure for working the movable elements of the fluid dispenser. v

For discharging the fluid, after it has operated the moving parts of the feeder in a manner to be' subsequently described, I provide an exhaust port by drilling a passage longitudinally into one end of the casing, preferably from the end opposite from the inlet port to facilitate connecting the device into the system or circuitl in which it is to be used. The outer end of the exhaust port 9 has internal threads H for convenient co'nnection withan exhaust pipe i3. In use my dis-V pensing feeder is preferably used in a system Lhav: ing suitable means for maintaining a higlLback pressure of about 590 pounds per square` inch in Such a system is fully disclosed in` a patent application Serial Number 116,773, filed December 19, 1936. Y f` VFluid dispensing ports i5 and 'i6 are provided arrangedrespectively in upper and lower horiT Vzontal rows disposed in the two opposite sides of the feeder casing i fordispensingn fluid there-y from. Ports l5 are shown in cross section in Fig.

I5 and I6 to facilitate connection with individual pipes extending separately tothe varicusstaticnsor bearings to tbe served.

For dispensing the fluid Yfrein the ports l5 and i6 'automatically in rresponse' tok unidirectional pressureY applied Yby' the fluid in the inlet port 3 Y ofjtrhe feeder, I provide a hydraulic-operator comprising a `hollo'w'piston `i9 which is slidably disposed in a cylindrical laperture'or bore 2| ex- Vtendingraxially*through the casing, `and which operates reciprocably therein.,4 The construction .and operation of my hydrauliceoperator is also disclosed and vdescribed in my {zo-'pending appli-4 cation serial Nanaevs entitledriydrauiic f.

operator and iiled December 2, 1936.

The ppposite ends ofthe hollow pistonlliare closedY by Vpiston plugs 23 andthe cylinder bore 2l loy'cylinder plugs 2,5which are threay'dablyrsecured therein.v To one of the pistcnplugsA 23" an indicator rod Zlisconnected, as by threading 4or weldingfandit projects frornthe casing through the adjacent cylinder plug Zwh'ich is Ysuitably apertured vand prcvidedwith 'a packing nut29 forj'cornpressing suitable packing to provide a sliding seal around the rod in a manner `that will be readily understood. As the piston I9 reciprocates in the feeder casing I, the projected indicator rod 2l' provides external indications of the continual operation cf theidevice. v

Slidably disposed in the hollow piston is a piss Yton valve of the Vdumb-bell type comprising fluid flow restricting heads 3l, 33, 35 and 131 'con` nected by connecting rods 4i, 43 and 45 of re- Internal plug 53, which is inserted through a suitable aperture in the side wall of the casing, is provided with interlocking recesses and 5l for engaging the outer end of the interlocking pin 5l, The camming plug 53 has an enlarged head Eil which is threaded for Vaccurately seating in an enlarged counter-bore '6i which is internally threaded for receiving the same. A groove is provided in the innery end of the camming plug 53 i'or receiving the cuter end of locking pin 5i and in cooperation with the recesses, prevents rotation of the hollow piston. A tool receiving aperture 63 is provided in the camming plug. n

When the camming plug 53 is properly installed, the camming recesses 55 and 5l on its inner end, arespaced apart in an axial direction in the casing l and the distance between them duced cross section to permitiiuid to flow freely Y.

around. f Spacing stop-'pins d project from opposite ends of the'v'alve 3l). The middle connec-` tor YIls, which is smaller 'in diameter thanthe bore #l withinV the piston, is larger thanv the otherfconnectors in order to provide interlocking grooves 579 vand 45S at opposite ends to beV inter'- lQck-ingly engaged Y Y eaperture vextending through the sidewall of. the hollow pston' lgnear"it's rr'iid po The pi' -51 isflcnger thantheaper:

bya lpin-5l which ,is fslid'ably 1 is Vsubstantially equal to the distance which the hollow piston i9 is free to slide in cylinder bore Y 2l. This distance is determined by the length of the hollow'piston i9- and the projected positions ofthe inner eids'v ofthe cylinder plugs 25. During the slidable movements of the hollow piston i9 in the casing the interlocking pin 5| is depressed by the cainrn'ing plug 53 to hold theV slide Y valve 3Q until the movement of the pistonis completed whenthe'slidevvalv'eris" released, and convers'ely, when the `parts are` in position for the slide valve' to shiftytheY carnport'iens thereof cause the pin to be depressed i'rito either of Ythe carhrning recesses 'to'preven't movement of the piston I9 simultaneously therewith.

For 'admitting'the vhigh pressure uid into opposite 4ehds 'of the' cylinder bore 2| t r'ever'sely work the 'hollow V`piston i9, I provide'a 'passage `which leads from the inletport 3 ytransversely through the side wall of the bore A2l substantiallyv al) middle f the CiSln'g. Nl' ifs Ilfl'dlOllfl',v

the 'side' Wall f the hollow piston I9 is pierced by apassge '51 and a g'ioOVe yEl; isV Cut from the the cylinder here 2l thus shifting the 'piston I9 top 'the right, and the'slide valve stays Ain the same relative position to Vthey piston I9, having y its head .'S to the right of the v port lo. Pressure entering through ports v3,l SS'and 8l now shifts slide Valve 30 to thev Vleft, the parts then being as' shown 'in Fig.` 6. The head 'S3- ofthe said valve seis 'now 'atjtiielleft of a 'port' 13, 'andnuiu'is thri passed f-rlrth'e -liHOW piston through an axial passage 'l5 into the right hand end of the cylindricalbore 2l, .as shown in Fig. 6, andthe hollow piston ll'9 4is then fo'rcedto the left said huid pressure.

YIn order that the reciprocating Y'movementof" A the hollow piston I9 may continue, as longwasr iiuid pressures are,` `applied `inthe finletrjport, 3,Y Y

itnecessary'to vmove Jtlne sliding valve infresponse-to thekmovernents of the piston and` this is conhects lipm'the inner end of theinlet port f3 andsuitably pierces the side-'wall fof theb'ore 2l for conductivelyccnnecting with `a port V'19 which Y pierces" the vadiacent side wall of -the hollowy pist0n, when the'pis't'on isatits le'ftpo'sition, asin Fig. 5. This tends to push the sliding valve to its right hand position, as shown in Fig. 5. The valve assumes this position immediately after the piston I9 attains its extreme left hand position, and upon its movement the locking pin is depressed into recess 55 in the manner previously described.

When the hollow piston I9 is in its right hand position, as shown in Fig. 6, the port 8|, which pierces the side wall thereof, connects conductively with the stationary port 83 which leads into the inlet port 3. This connection applies fluid pressure in the right hand end of the hollow piston for moving the slide valve to the left hand end as viewed in Fig. 6.

In order that the valve may thus continue to slide in alternatively opposite directions in response to fluid pressures applied alternately to opposite ends thereof, it is necessary to exhaust the fluid charged into the opposite end of the hollow piston |9 by the previous operation. For this purpose an exhaust port 85 is so disposed in the piston side wall adjacent the left end of the piston that it connects with a stationary exhaust port 81 leading into the outlet port 9 in the casing, when the piston I9 is in its right-hand position, as in Fig. 6. In the alternate position of the piston I9, as shown in Fig. 5, a port 89 connects with a port 9| leading into the outlet port 9 for exhausting fluid previously charged into the right hand end of the piston.

It will thus be seen that the application of fluid pressure in the inlet port 3 causes pressures to be applied alternately through the passages 1| or 15 for reversely moving the hollow piston under the control of the slidable valve carried therein, and that the movement of the piston completes fluid conducting connections for successively reversely operating the sliding valve. The operation of the sliding valve 38 and of the piston I9 is further controlled by the locking pin 5| which prevents simultaneous movement thereof.

From the respective rows of dispensing ports I5 and I5, measured quantities of uid are discharged alternately and successively by the continued operation of the hydraulic-operator. For this purpose, the side wall of the hollow piston I9 of my hydraulic-operator is drilled to provide a passage 93 extending axially therethrough, and the ends of the passage are closed by metallic plugs 95 threaded or welded therein. From the intermediate portion of the hollow piston I9, into which fluid pressures are continuously applied from the inlet port 3 as previously explained, I provide a transverse passage 91 which connects into the middle of the elongated axial fluid dispensing passage 93 in the piston.

In accordance with my invention, the fluid dispensed from the elongated dispensing passage 93 in the piston to the respective dispensing ports I5 and I5 is measured and this is accomplished in measuring chambers 99. There are half as many dispensing chambers as there are ports I5 and IB. For instance, the feeder shown in Fig. 1 is provided with ten measuring chambers 99, and with twenty discharge outlets I5 and I6, half of the outlets being on one side and half on the other side of the feeder.

Each measuring chamber 99 is a cylindrical bore drilled transversely through the casing I to slidably receive a measuring piston I9 I. The ends of the measuring chambers 99 are provided with counter-bores |92 which Vare threaded for receiving plugs |93, having wrench receiving apertures |D5,as shown in Fig. 4; Spacing pins |01 extend from opposite ends of each measuring piston |0| for abutting the end plugs |83 to stop the `pistons in spaced relation therefrom.

For adjusting the degree of movement of the measuring piston IUI an adjustable threaded stop rod |09 is threadably mounted in an adjusting plug which may be conveniently installed in any of the chambers where it is desirable to provide for adjusting the measured quantities of fluid discharged therefrom. A wrench receiving portion ||3 of square or hexagonal conformation may be provided for installing or removing the adjusting plug |I A conduit passage ||5 connects from one end of each measuring chamber 99 and extends toward the axis of the cylinder bore 2| for intersection with the side wall thereof. From the opposite end of each measuring chamber, a passage Il1 extends to similarly intersect the walls of the cylinder bore 2|, but at a smaller angle from the chamber 99. The respective opposing passages ||5 and I|1 of each measuring chamber 99 thus connect into the cylindrical bore 2| from alternately opposed sides of each succeeding chamber 99, that is to say passage ||5, which is directed toward the axis of the bore from one side of the rst measuring chamber, is connected from the opposite end of the next measuring chamber, and so on as may be seen in Figs. 2, 3 and 4. Throughout the length of the casing the measuring chambers 99 are thus provided with the end connecting passages ||5 and |I1 disposed on alternately opposite sides of the casing.

As the piston I9 slides in the casing it dispenses fluid from the elongated dispensing passage 93 into the ends of the measuring chambers 99 through passages ||9 provided in the piston and disposed in alternately opposite directionsvfor connecting with the passages ||5. By this arrangement the measuring piston IDI in each measuring chamber is moved in the rev verse direction, as compared with the adjacent pistons. As shown in Fig. 3, the measuring piston |8| has completed its movement to the right in the measuring chamber, and in so moving it discharged a predetermined quantity of iluid which had been previously charged in on the opposite side of the piston. 'Ihe dispensed fluid passed out through passage |I1 and thence through an arcuate groove IZI, cut in the peripheral outer surface of the right side of the piston for connecting with the inner end of a passage |23, through which the dispensed fluid passed out of the adjacent dispensing port I5.

In the next adjacent measuring chamber, as shown in Fig. 4, the fluid under pressure was passed from the dispensing passage 93 by Way of passages ||9 and ||5 into the right end of the chamber 99 forcing the measuring piston IEII to the far or left end and dispensing the fluid previously charged therein,through the passage |I1 around an arcuate groove |25 in the left side of the piston and thence by way of a passage |21 out of the adjacent dispensing port I6. There are a total of eleven arcuate grooves |2I and |25 and a total of eleven passages ||9 located in the t hollow piston I9 or a total of 22 passages, eleven of which are -equidistantly and alternately disposed on each side of the hollow piston II. One side of the piston will have ve arcuate grooves and six passages II9 piercing it and the other side of the piston will have six arcuate grooves and five passages |I9 piercing it.

There are ten passages H5, ve in each side of the casing and ten passages I I1, ve in each Vten measuring chambers.

Vingy shown in'Fig.r 1.

ftakesplace. y 1 i "En :a given, position .of `the pist-on I each ofi thev pistonsY Igtshiftsbutfonlylone half ofithedis-iv side Aof.' the casing. `Eachmeasuring. chamber t@ hasonerof eachof said` passages. II5.and III, one connecting each VendY to the piston bore -2I. rEhepassages I E5 and II?. serve alternately as inlet and discharge/passages to their respective measuring chambers. When'. fluid enters va measuring chamber 9- from itsas'sociated' passage H5, kit discharges a measured' quantityof duid Afrom the other orpreviously charged side of its piston IeI. through its vassociated passage Ill which will then connect; withan, arcuate groove. When the hollow piston I9 shifts soas to permit'pressureiiuid to flow through a. passage H9 tou a passage Ii'i, fluid will. thenr enter the measuring chamber 99 through said pas. sage IH and its piston' liti Ywill discharge. the

' fluidl from the previously charged side ofthe chamber through itsrassociated passage IIE.

Locking-at Fig. 2, it will beseen that inthe embodiment shown, six grooves |21. are` indi--` cated inr dotted lines, located on the far side .of

'the piston, ail 1cut the extreme left one'being shown in position *to-discharge throughv the. far

' side outlet ports i5.'

In the same Fig. 2, it will also benoted that al'portion of the bores ofifive passages INES arel lshown-and theyV connect. to theve passages i ishown 'in dotted; lines, which connect to the-far vside-cf the first, third', fifth, seventh v*andY ninth -measuring chambers 99,

counting* froml the-left. The second, fourth,

1 sixth, eighth and tenth measuring chambers 99 are shownhaving passages I il (shown indotted line-s) which connect the far side A.of saidr measuri-ngV chambers with the veof the six arcuate grooves i-Zfas shown. Y

' There are twenty outlet or V.discharge ports i5 and Yi-e,'fi ve ports l5 and five ports I6, a total of ten Abeing located on each Vside. of the feeder, and there are twenty casing discharge passages and icon'nected thereto, but there are only enters one side of a measuring chamber Y95%,.as seen Vi'fiigs 3 or 4, the hollow piston Valve I9 is in position to close one of its associated discharge passages and ports; It 'follows that only ten of the-twentydischarge ports dischargev at oneY tin-ie.r In Fig. 2,v five ports I5 are shown (in Vdottedlines) connected for discharging on the far side'of the casing from the second, fourth,

sixth, eighth and tenth measuring chambers 99,

whiletheiirst, third, fifth and ninth measuring [chambers 99 are ine-position to discharge simultaneously therewith `through theiive discharge ports ithat are located on the side of the cas` As lthere are twenty-two .passages piercing. the

hollen/piston iii-,and as eleven of these are eduidistantiy andaiternately spaced on each side of said piston, twenty of them rare',consequently, in positionto register with Ythe twentypassages 'i iiandA Eil inreitherA extreme position 'of the Y' 'hollow piston ig, ten of the twenty passages I I5 3 and It! liacting as inlet passages to their respecf tiverneasuring lchambers at a time, being then in communication lwith tenl of -the eleven pas--v sages'ilid so' asV to receiveuid under pressure, Wliielthe'otherten of said passages H5 and VI I'I act as.discharge.passagesrfrorn their respective measuring chambers, being then .inl communica-- tion with ten'cf theelevengrooves i2!Y or I25.

Y `When .the hollow piston 'i9 shifts, opposite connections.` are VYmade sov that cthe* reverse action Hence, Vwhen fluid Y fluid into the ends of each measuring chamber from which fluid was discharged by the previous operation. Simultaneously, ten of the eleven arcuate grooves |25 and IZI in the piston, all except the one closest to one ofthe plugs 25 then abutting the-'end of the main piston, are connected with the discharging sides of the ten adjacent measuring. chambers Sethrough ten of the passages I I5 and Il 1. for taking'the fluid dispensed therefrom intogtenof the twenty adjacent dispensing ports which were disconnected in the previous operation, and simultaneously therewith ten of the. eleven passages IIS, all except the one closest toone. of the plugs 25, are adapt-V toregister with and communicate with ten of thetwenty passages H5 and 'II'I which were disconnected in the previous operation. Y

in some installations Yitis desir-able to operate the fluid dispensing feeder by` means of va werke.

ing iiuid of a differentl character from the fluid which-is to ce dispensedby meansvof Ymy feeder. For example, it is sometimes desirable to operate Y the feeder by means of anV oil of ahigher grade than oil or grease which .is to be dispensed to bearings although it is t0 be understood that the use kof my automatic feeders is not limitedv to lubrication systems Vas Vit also has many other` applications. f n

When. it is desired to use working and dispensing fluids ofV differentY characteristics, and

' able pipe line for supplyingY the dispensing fluid to thefeeder'separately vfrom 'the working fluid.

`From the inner end of. the dispensing fluid iniet port V31, an inlet. passage |33. is drilled transversely tointersecta passage |135 which is drilled into the side wall of the casing from one end and` substantially parallel to the axis thereof; Theouter end ofthe axial passage IE5 is closed by a, metallic plug I3?, secured in any suitable manner. From Ithe inner end of thev axial pas. sage i335. ai transverse passage |39 pierces the.: adiacent side of the cylindrical piston guiding bore 2l. for deiivering dispensing fluid thereto.V

To receive the.. dispensing fluid thus delivered into the piston guidingbore 2i the hollow piston Y iii of the hydraulic-operator, fis provided with ar groove .Isl which'is rcut in the outer peripheral Y surface'. of-the .piston i9 and which is suitably elongated tollprovidecontinuous connection withV the. inner end of the transverseVV passage i39 through theentire stroke of the piston I9 as-it reciproca'tes automatically,Y as previously de-V scribed, in response tothe pressure of the work-Y in the inlet port 3'of Y ing fluid whichA is applied the casing.

Inthis embodiment of my dispensing feeder, Y y 'Y y passage 93, which extends through' the lengthv of vthe hollow Vpiston VIlgiis continuously supplied with dispensingV Vfluidaunder pressure Vfrom the inlet port.` VI3I thrcugha passage 1I d3 drilledffrom the'bottomrof the groove vIiiIJin the piston andi extending per-A thek elongatedfiuid dispensing pendicularly to the axis of the piston for intersecting a passage |45 which extends substantially at right angles to intersect the long passage 93 in the piston. The elongated dispensing passage 93 thus receives dispensing fluid continuously and independently of thevworking fluid Which passes through the internal valve guiding bore 41 in the hollow piston I9 for reversely operating the piston I9.

In this embodiment the passages 1I and 15 Which discharge Working fluid from the piston for reversely moving the same, are drilled through the piston both on the same side of the hollow bore 41 because of the dispensing fluid passages |48 and |45 which pass on the opposite side thereof.

The operation of the hydraulic-operatoris not modied by the rearrangement of passages |43 and |45 in the piston, and as the hollow piston I9 reciprocates it dispenses measured quantities of the fluid from the elongated dispensing fluid passage 93 through alternate sets of the dispensing ports in the casing.

In accordance with the embodiment of my feeder, shown in Figs. 9 through 12, I provide `two large dispensing pistons |5| and |53 slidably disposed in a cylindrical bore |55 which extends through the casing parallel to the axis thereof, and which is divided in the middle by a plug |55. Stops |58 space the pistons from the plug |56. The ends of the bore |55 are internally threaded to receive cylinder heads |51 therein.

Indicator rods |59 are connected at one end to each of the dispensing pistons, and project in opposite direction from the casing through the adjacent heads |51 which are suitably apertured therefor. Each cylinder head plug |51 comprises a packing gland ISI to receive packing material |63 which is packed around each rod |59 by means of a nut |65. An indicator rod projecting sheath |61 of tubular conformation projects outwardly from each cylinder head |51 and is provided with open side wall portions |69 through which the indicator rods |59 may be observed.

The tubular sheaths |61 are each provided with threads |19 to receive adjustable stop plugs |1I for engaging the outer ends of the indicator rods |59 as they are projected from the casing. By adjusting the positions of the stop plugs I1I in the sheath the degree of movement of the dispensing pistons may be conveniently varied and it naturally follows that the amount of fluid discharged may be varied. A second threaded lock plug |13 is turned into the sheath for locking the stop plug I'II.

In this embodiment of my invention, dispensing fluid is supplied through a supply pipe |13 threadably received'in a dispensing fluid inlet port |15 connecting through a passage I 11 into the side Wall of the piston guiding bore 41 at approximately the middle thereof. For continuously charging the passage 93 with dispensing fluid in all positions of the piston I9, I provide a passage |19 which leads transversely from the passage 88 toward the port'I15. At its outer` end the passage |19 opens into a recess IBI which is elongated axially of the piston for connecting continuously with the inner end of the passage |11 from the dispensing fluid inlet port |15.

rFor connecting from the outer ends of the elongated dispensing passage 93, the adjacent side walls are pierced by transverse ports |83 and |85 connectable with transverse stationary ports |81 and |89 respectively when the hollow piston llo I9 is moved to the left. From the stationary ports |81 and |89 passages I9| and |93 respectively connect and each extends longitudinally toward the adjacent end of the casing. The outer ends of the passages are closed by suitable plugs |95 which are recessed as by driving them therein. Passages |91 and |99 are drilled from the open ends of the bore |55 through the side Walls into the passages |9| -and |93 respectively.

As the dispensing pistons move inwardly to- Ward the dividing block |56 they are stopped in spaced relation therefrom by stops |58. From thespace thus defined between the pistons |5| and |53 and the dividing block |56 transverse `passages V29| and 293 respectively are drilled through the side wall vof the bore |55 through ,the adjacent side wall of the piston guiding borev 91. For connecting from the long dispensing passage 93 into passages 29| and 203, when .the hollow-piston I9 moves to .the right, I provide suitably spaced apertures 285 and 281 in the piston.

For dispensing fluid from the casing I, I con nect delivery pipes 289, 2|I, 2I3, and 2|5 into ports 2|1, 2I9, 22|, and 223 therein, as shown in Fig. 9 and in dotted lines in Fig. 10, and from the inner ends of the ports, passages 225 are drilled through the adjacent side wall of the piston bore 41. As shown in Fig. 1l, dispensed uid is fed from the passage 225 through a groove 221 cut in the outer surface of the piston, when the piston is to the left as in Fig. l0, to supply delivery pipe ZII. Four corresponding grooves 221 are cut in the surface of the piston I9I in suitable spaced relations whereby a simultaneous connection is provided for taking fluid through the passage 203 from the left of the piston |53 to pipe 2|3. When the hollow piston I9 moves to the right, the other two grooves 221 provide connections for feeding delivery pipes 299 and 2I5 from the outer ends of the pistons |5| and |52 respectively.

In operation 'the hydraulic-operator piston I9 reciprocates in its `bore 41 in response to the pressure of the working fluid supplied to the inlet port of the hydraulic-operator in Aa manner which has been previously described.

`As the piston moves to the left, as shown in Fig. 10, connections are completed from the delivery lluid supply pipe |13 into the outer ends of the bore |55 thus moving the piston |5| and |53 together. During this movement, fluid previously charged into the space adjacent the dividing block |53, is discharged into delivery pipes 2II and 2I3. When the hollow piston I9 moves to the right hand position, as viewed in Fig. 10, the ports and passages described 'are connected for injecting dispensing fluid into the bore |55 adjacent the dividing block |561l and the pistons |5| and |53 are are pushed outwardly for discharging measured quantities of fluid into lf-'delivery pipes 289 and 2|5.

It will be noted that any suitable means may be provided for varying the amount of fluid displaced upon each stroke of the piston I9. For instance, by substituting an indicator having a vlarger diameter, or by using an indicator4 on both ends of the piston I9, less fluid will be received and displaced in the respective ends of the cylinder bore 2| of the casing and thus the reciprocation of the piston will be speeded up materially.

Aside from the specific embodiments of the invention kherein shown and described, it will be understood that numerous details of the conling fluid pressures from said inlet port to reverse- 1y move said piston said casing, fluid conduits controlled by theY reciprocations of said piston for applying fluid ypressures to reversely ioperate said valve whereby the piston vand lvalve r automatically perform successive operating cyclesrin response to suitable fluid pressure applied in said inlet port; iluid dispensing ports in said casing, pressure actuated fluid measuring means lcontrolled by the reciprocations of said fluld responsive means for dispensing fluid out of said dispensing ports and a separate port adapted to continuously 'discharge a portion of the high; pressure Iluid that enters saidV casing th-rough `the inlet port and that passes 4through said casing and operates said fluid responsive means. s 'Y Y s 2. A'fluiddispen'sing feeder VVfor use in a uniflow system comprising, a casing, an inlet port for connecting high pressure ilui-d into said casing, a hollow piston operator slidably disposed in said casing, a fluid responsive valve slidably disposedl therein,V iluid controlling vports and passages controlled 4thereby for applying fluid pressures from said inlet port to reversely move said piston in said casi-ng, fluid controlling ports and passages'controlled by the reciprocations of said piston vfor applying'iluid'pressures to reversely operate said valve whereby the piston and ,valve automatically perform successive operating cyclesv in response to suitable fluid'pressure applied in said inlet port, fluid dispensing ports in said casing, pressure actuated iluid measuring pistons controlled by the reciprocations of said fluid responsive piston for dispensing fluid out of said dispensing ports and a port for exhausting the working fluid after it has actuated said piston operator.

Y V3. A fluid dispensing feeder for use in a uniflow system comprising, a casing, an inlet port for connecting high pressure iluid into said casing, a hollow operator piston slidably disposed in said casing, a iluid responsive valve slidably dis- 'an inlet port for receiving high pressure fluid Vinto said casing, fluid responsive means slidably 'disposed for reciprocation longitudinally in said casing, dispensing ports in said casing, luid responsive dispensing means disposed for transverse movement in said casing for dispensing measured quantities of fluid from said dispensing ports, fluid conducting means controlled by the movements of said iluid responsive means for applying iluid pressures to actuate said dispensing meansv and a separate port adapted to continuously discharge a portion of the high Vpressure fluid that enters said casing through :the inlet port'and that passes through said cas- 15 -ing and operates said fluid responsive means.

5. A fluid dispensing feeder for use in a uniflow rsystem comprising, an elongated casing, an inlet .port for receiving high pressure fluid into said casing, fluid responsive means slidably disposed for reciprocation,longitudinally in said casing, dispensing -ports'in said casing, fluid responsive dispensing pistons disposed for slidable movement transversely in said casing, for dispensing measured quantities of fluid from saidA dispensing ports, fluid conducting means condispensing pistons in opposite directions, and a separate port adapted to continuously discharge a portion of the high pressure fluid that enters lsaid casing 'through the inlet port and that passes through said casing and 'operates said fluid responsive means.

6. A fluid dispensing feeder Vfor use in a. uniflow system oomprisii'ig,A an elongated casing, Va

hollow vpiston .slidably disposed for longitudinal movement in said casing, an inlet port for ap-V plying high pressure. fluid therein, fluid responsive valve means in said piston actuated by iluid 40 pressures applied therein in accordance with the for applying high fluid pressure to one side of posed in said piston for applying fluid pressures y of said pin whereby simultaneousmovement of` the hollow piston and the said valve is prevented, fluid dispensing ports in said casing, fluid measuring means controlled by the reciprocations of said hollow piston for dispensing measured quantities of fluid from said dispensing ports, and a port for exhausting ythe working iluid after the hollow piston has. been actuated thereby.Y

4,'A fluid dispensing feeder for use in a uniflow system comprising,` an elongated casing, 75 130115,7

each Adispensing piston, and for simultaneously connecting from the opposite'side of each dispensing piston to a corresponding alternate one of saiddispensing ports for discharging a measured quantity of fluid therefrom, fluid conducting means actuated by the reverse 'movement of Y said hollow piston for alternately applying high fluid pressure rst to one side and then tothe reverse side of each dispensing piston and for simultaneously connecting the opposite side of each dispensing piston to the alternate ones of said dispensing ports and an exhaust port for d1scharging working fluid from said casing.

7. A fluid dispensing feeder for use with a separate working fluid supply source comprising a casing, a iluid responsive operating piston slidably disposed in said casing, valve means controlled by the movements of said piston for applying fluid pressures to reversely operate the p1ston, iiuid measuring dispensing pistons slidably disposed in said casing, a working fluid inlet port for supplying working fluid to operate said operating p1ston, a dispensing fluid inlet port for Y supplying dispensing fluid to said dispensing pisdispensing ports in said casing, and re- :trolled by the movements of said fluid responsive `rneans'for'applying fluid pressures to actuate said versing iuid conducting-connections controlled by said operating piston in the alternate positions thereof for alternately connecting the dispensing fluid inlet port to opposite sides of each dispensing piston whereby the said dispensing pistons discharge a quantity of fluid out of half the dispensing ports upon each reciprication of the operating piston.

8. A fluid dispensing feeder for use with a separate Working fluid supply source comprising, an elongated casing, a working fluid inlet port, an operating piston sliding longitudinally in said casing, valve means controlled by said piston for automatically reciprocating the same in response to iiuid pressure in said working fluid inlet port, an elongated passage disposed in said casing substantially parallel to said operating piston, a dispensing fluid inlet port connecting into said passage, a plurality of dispensing ports in said casing, fluid iiow measuring means, fluid conducting means controlled by a movement of said operating piston for completing a connection from each of said dispensing ports through said fluid flow measuring means to said dispensing fluid inlet port, and means responsive to the reverse movement of said operating piston for reversing the connection from each dispensing port through the fluid flow measuring means whereby said measuring means is reversely operated.

9. A fluid dispensing feeder comprising, a casing, an inlet port for receiving high pressure fluid therein, a piston operator slidably disposed in said casing, a valve actuated in accordance with the movements of said piston for applying fluid pressures from said inlet port to reversely operate said piston, dispensing ports in said casing, fluid dispensing means actuated by the reciprocating movements of said piston for dispensing fluid from said fluid dispensing ports, and an indicator rod connected to said piston operator and projecting from said casing for providing visual manifestation of the operation thereof.

10. A fluid dispensing feeder for use in a uniow sys-tem comprising a casing, an inlet port f of fluid dispensing ports associated with each i dispensing piston, and fluid conducting means controlled by the movements of said operator piston for directing fluid from said dispensing fluid inlet port for reversely operating said dispensing pistons for dispensing measured quantities of iiuid alternatively from the respective pairs of dispensing ports associated therewith.

11. A fluid dispensing feeder for use in a uniiiovv system comprising, a casing, an inlet port for receiving high pressure fluid therein, a iiuid actuated piston slidably operated in said casing, valve means actuated in accordance with the movements of the piston for applying iiuid pressures from said inlet port to reversely operate said piston, a dispensing fluid inlet port in said casing, a pair of relatively large fluid dispensing pistons slidably disposed in separated relation for sliding axially in said casing, a pair of fluid dispensing ports associated with each dispensing piston, fluid conducting means controlled by the movements of said operator piston for directing fluid from said dispensing fluid inlet port for reversely operating said dispensing pistons for dispensing measured quantities of fluid al-ternatively from the respective pairs of dispensing ports associated therewith, an indicator rod connected from each dispensing piston and projecting axially from each respective end of said casing, a protector sheath partially enclosing each one of said indicator rods and an adjustable stop supported in each protector sheath for adjustably limiting the outward movement of 'each of said indicator rods for adjusting Ithe measured quantities of fluid dispensed from said casing.

12. A fluid dispensing feeder for use in a uniow system comprising, a casing, an inlet port adapted to continuously receive a unidirectional high pressure fluid therein, a reciprocable fluid responsive member movably disposed in said casing, said member being actuated by the fluid as it passes through the feeder, fluid dispensing ports in said casing, means associated with said fluid responsive member for dispensing fluid from one half of said dispensing ports simultaneously while said member is in one of its extreme positions and for dispensing fluid from the other half of said dispensing ports simultaneously While it is in its other extreme position, and a separate port adapted to unidirectionally discharge a portion of the high pressure fluid that enters said casing through the inlet port and -that passes through said casing and operates said iiuid responsive member.

13. A fluid dispensing feeder for use in a uniflow system comprising, a casing, an inlet port adapted to continuously receive high pressure fluid therein, a cylinder in said casing, a reciprocable fluid responsive piston movably disposed in said cylinder, said piston being actuated by the iiuid as it passes through the feeder, iiuid dispensing ports in said casing, means associated with said fluid responsive piston for dispensing uid simultaneously from one half of said dispensing ports while said member is in one of its extreme positions and for dispensing fluid simultaneously from the other half of said dispensing ports While it is in its other eXtreme position, a separate port adapted to unidirectionally discharge a portion of the high pressure fluid that enters said casing through the inlet port and that passes through said casing and operates said fluid responsive piston.

14. A fluid dispensing feeder for use in a uniflow system comprising, a casing, an inlet port adapted to continuously receive a unidirectional high pressure fluid therein, a fluid responsive piston disposed in said casing, movable alternately to opposite extreme positions by energy derived from uniflow high pressure fluid received in said inlet port and actuating said piston as said fluid passes through the feeder, fluid dispensing ports in said casing, means for dispensing fluid from alternate ones of said dispensing ports during the times that said piston is in an alternate extreme position, and a separate port adapted to unidirectionally discharge a portion of the high pressure fluid that enters said casing through the inlet port and that passes through said casing and operates said fluid responsive member.

15. A fluid dispensing feeder for use in a uniflow system comprising, a casing, an inlet port adapted to continuously receive high pressure uid therein, fluid responsive control means movably disposed in said casing for reciprocable movement byrenergy vderived 'from uniow high pressure fluid receivedyin said inlet port, uid' dispensing ports in said'casing, separately mov-` able fluid measuring means controlled by iuid` pressures applied by the reciprocations of said fluid responsive means for dispensing measured quantities of fluid from saidV iuid dispensing DAVID R. HILLrs. Y 

